Noah Webster's New International Dictionary of the English Language

1. (a.) Hot or burning; passionate; fervent; as, an ardent concern; causing a sensation of burning; fiery; as, ardent spirits, that is, distilled liquors; an ardent fever.

2. (a.) Having the appearance or quality of fire; fierce; glowing; shining; as, ardent eyes.

3. (a.) Warm, applied to the passions and affections; passionate; fervent; zealous; vehement; as, ardent love, feelings, zeal, hope, temper.